Doubtful is an adjective; it describes something that is in doubt (noun) or something you doubt (verb). Example uses:
Adjective: The doubtful weather makes it difficult to decide if we should go today.
Noun: My doubt about his ability was proven wrong by his results.
Verb: We don't have much cake left, I doubt there is enough to serve guests.
You can tell it is not a verb because it is impossible to put the preposition "to" in front of it in order to create an infinitive verb, i.e. "to doubtful", or to use it in a sentence such as "I doubtful something". It also cannot be a noun because you cannot put "the" or "a" in front of it and use it in a sentence like "I see the doubtful" or "Can I have a doubtful?"
"Doubtful", as an adjective, means that it can be used either as an attribute, describing something ("The painting was of doubtful origin") or as a predicate adjective which usually appears alone after a verb ("I am doubtful" or "she is feeling doubtful"). "Doubtful" is probably most commonly used in this second way, as a predicate adjective. As an attribute, other words such as "dubious" (which is related to the word "doubt") are more often used.
"Doubtful" can function as both an adjective and a verb. As an adjective, it describes uncertainty or skepticism. As a verb, it means to feel uncertain or have suspicions about something.
The noun form of the verb "noun" is "noun-ness" or "nominalization."
Change the verb "run" into a noun. Change the verb "cook" into a noun.
No, blowing is not a noun. It is a verb.
Verb: loathe Noun: loathsomeness
Noun: satisfaction Verb: satisfy
This could be either of these words:inconvenience (verb, noun) - a problem, impediment, or delayunconvinced (adjective) - not persuaded, not yet believing, doubtful
The noun form of the verb "noun" is "noun-ness" or "nominalization."
The noun 'is' is a verb, a form of the verb 'to be'. The verb 'is' functions as an auxiliary verb and a linking verb.
No, it is a verb or a noun (to go around, to surround; a round shape). The adjective form is circular.
noun
A roar is a noun. To roar is a verb.
Training is a noun and a verb. Noun: e.g. activity of acquiring skills. Verb: present participle of the verb 'train'.
Has is a verb; it is not a noun. It is the third person singular of the verb to have. It functions as a helping verb as well, but it is not a noun.
A verb can be in a subjective mood when it use to express something that is doubtful.
It is neither a noun or a verb.
Noun. Photosynthesizing is a verb.
Is plan a noun or verb